Ribbon mechanism for calculating-machines.



'A. PENTEGOST.

RIBBON MECHANISM FOR CALCULATING MACHINES.

APPLIOATION FILED AUG. 5, 1905.

Patented Feb. 9, 1909.

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' APPLICATION FILED AUG. 6, 1905.

Patented Feb. 9, mg;

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@IBBON MECHANISM FOR GALOULATING MAGHINES. APPLICATION FILED AUG. 6, 1905.

912,162. Patented Feb. 9, m9.

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ARTHUR PENTEoos'r, or EAST O NGE, NEW JERSEY, ASSIGNOR TO PIKE ADDING MACHINE COMPANY, OF ORANGE, NEW JERs Y, A CORPORATION or NEW JERSEY.

RIBBON MECHANISM FOR CALCULATING-MACHINES.

\ Specification of Letters Patent.

Patented Feb. 9, 1909.

Application filed August 5,1905. Serial No. 272,913.

To all whom it may concern:

Be it known that I,;'An'rHUR PENTEGOST, a subject of the King of Great Britain, residing at East Orange, in the county of Essex and State of New J ersy, have invented certain new and useful. Improvements in- Ribbon' Mechanism for Calculating-Machines,-

of which the following-is a specification.

The present invention relates to improvements in ribbon mechanism for type printing machines and 'is particularly designed for use with the recording devices of adding machines.

The object of the invention is to provide a simple and durable means for supporting and feeding an inked ribbon across thepath of the printingtype and in a substantially straight line from one supporting spool to the other. Also to provide means for automatically reversing the direction of movement of the ribbon when has been entirely unwound from either of its supporting spools.

As the invention is particularly adapted for use in connection with adding machines it is shown in the accompanying drawing as applied to the recording mechanism of an adding machine invented by W. H. Pike, J12, which is illustrated in detail in Letters Patent No. 7 91,941- granted June 6, 1905.v

Referring to the drawings :'*F igure 1 is an elevation of the upper portion of such a recording mechanism having the present in-- vention applied thereto; Fig. 2 is a plan view; Fig. 3 isa side elevation; Fig. at is a detail view; Fig. 5 is an elevation of a different embodiment of the invention from that illustrated in Figs. 1 to 4; Fig. (3 is a view on the line (36 of Fig. 5.

The ribbon spools 1, 2, are carried by short shaft-s mounted in brackets 3 secured to'and projecting laterally i'rom the side plates l, 5,' between whiclfithe several parts of the recording mechanism are arranged. Each spool is detachably secured-to its supportingshaft by a suitable nut 6, whereby the spools may be readily e gchanged or re versed if desired, the shaftand spool being provided with interlocking means causing the opposite ends thereof from the spools are mounted ratchets 8; 9, the teeth of which v extend in' opposite directions. Spring wasliers 10 with yielding fingers are interposed between the 'ratchets and disks ll loosely supported on the shafts and bearing against the. adj a'cent faces or sides of the brackets 3.

The ratchets 8, 9 are adapted to be respectively engagedby pawls 12, 13,- mounted at opposite ends of and dependin from a bar 1 1 that extends through suitab e uide ways formed in the side plates 4, 5. V aoh pawl is pivotally mounted on said-bar and has the section thereof above its pivot normally drawn against a pin v15 by a spring 16.

On a suitable bearing on the side plate is pivoted a bell crank lever 17 to the upper arm of which is pivotally connected.

one end of a link 18 having at its other end a laterally projecting stud- 19 adapted to enter either of two notches 20, 21 formed in the upper edge of the pawl carrying bar 1 1. The stud l9 is-preferably provided near its free end with an annular groove into which the bar 1% projects-and the link 18 extends through a guide slot in the side plate 4. The section of the bar 14: between the notches 20 21 is provided with inclined sides and a coiled spring 22 acts to draw the stud 19 into engagement with the bar. To the other arm of the bell crank 17 is connected, one end of a rod or link by means of which said bell crank is rocked to reci rocate the bar 11. In the embodiment of the invention illustrated a universal joint is interposed between said rod 23 and the bell crank 17. The ribbon 2 t has its ends secured to the spools 1, 2 and extends across the space between. them being guided by suitable projections on the frame of the recording mechanism. Each spool is preferably provided with a guard finger 25, and the ribbon passes between projections 26 on the frame of the recording mechanism and spring fingers 2'? secured to said projections.

The operation of the parts above described is. as follows The rod or. link 23 isreciprocated periodically during the operation of the machine. Assuming that the parts arev in the position shown in full lines in the drawing, it will be seen that as the rod or link 23 movesdownwardly the bell crank 17 will move'the pawl. carrying bar 14: so that the pawl 12 thereonwill engage the ratchet 8 and rotate the spool 1 connected therewith thus moving theribbon a short distance in the direction otthe arrow 0:. 0n the upward stroke otithe rod 23 the parts will be returned to normal position, the

pawl 12 rocking slightly about its axis as it passes over the upper edge of the tooth or teeth of the ratchet in rear of that previously engaged by it. As soon as the pawl passes such toothbr teeth it "is returned to its normal position by the spring '16. It

.will be noticed that the bar "let is of such length that only one of the-ratchets will be engaged thereby at a single reciprocation of said bar; and therefore when' the parts occupy the .relative positions indicated in full lines in Fig. 1 the pawl 13 will not one gage its ratchet 9 during the reciprocation of the pawl carrier bar 14;. W hen the movements above described have been repeated sufiiciently long to entirely unwind the ribbon fronr the spool 2 the ratchet 8 is held from turning at the next downward stroke of the link 23 and the pull exerted on the link 8 by the bell crank 17 causes the stud 19 t ride up the incline separating the notches 2]., 20 in the bar 14:, {and pass over said notch 20 into which-itis drawn by the spring The return of the link-18 to the position indicated in full lines in Fig. 1, as

the rod 23 rises, acts to shift the pawl car rier 1 1 relative to the bell crank 17, so that the pawl 12 is relatively closer to said bell crank than wien the link 18 was engaged with the notch 21 in thebar 1 1. At each reciprocation of the rod 23, after such variation or change in the relat on of the pawl carrying bar 14 and the bell crank 17- the pawl 13 will actuate the ratchet 9 and rotate the spool 53 to move the ribbon ina reverse direction from that in which it was moved by the action of the pawl 12 on the ratchet 8. W hen the ribbon has been entirely unwound from the spool 1 the relation of the bar 1a to the bell crank 17 will be again varied so that the link 18 will on- ,gage the notch 21 and the direction of movement of the ribbon will thlis be automatically reversed. A, j

v In Figs. 5and 6, which'illustrate an embodiment of the invention diiiering in detail somewhat from that 'above described, the,

cach reciprocation of the bar 14:

- cranes nected with coiled springs 31, the lower ends of which engage studs 32 on the arm 28 whereby the roller is held in contact with the lowerside of slot 29. At its ends the bar 1 1 is provided with laterally projecting parts are in the position shown in Fig. 5, (the rod 23 being shown depressed and the bar 14 being at the'limit of its movement toward the left) the pawl 13 will be actuated at lVhen however, the ribbon is entirely wound oil from the spool actuated by the pawl 12 the resistance offered at the next reciprocation oi the bar 14 will shift the arm 28 from the position shown in Fig. 5 into engagement with the opposite end of the slot 29 and the subsequent reciprocatioiis of the bar 1% will actuate the pawl 12 and move the ribbon in a direction opposite that in which it was moved. when" the pawl 13 -was actuated. 'lheactuating bar in either of the forms shown may be operated from any-moving part of theinachinc, that is, for instance, it may be connected to be reciprocated from an arm on the shaft 922 of the machine or the Pike patentTQLQ-l.

It will be seen that by the present invention there .isprovided a ribbon mechanism which is particularly adaptedfor use with adding machines and by which the ribbon moves in a spraight line tronrone spool to another, said spoolsibeing arranged relatively close together and being supported in such a manner as to be readily accessible.

Claims: 1 i

1. In ribbon feeding mechanism, the combination of two spools, means for rotating eachspool, a bar adapted to be reciprocated to impart a step by step movement to both said spool rotating means, and means for reciprocating said bar adapted to be con nected therewith at either of two points and to impart a uniform reciprocatory movement to the bar at each actuation thereof. I

2. In a ribbon feeding mechanism, the combination of two spools, a feed wheel for each spool, a reciprocating bar, means actu- .oi said spools at each reciprocation, and

means for reciprocating said bar a uniform distance at each actuation thereot to rotate nected to both spools, means for rotatin spool, for the purpose described. 15 I spools including a bar adapted to reciprociprocate transversely of the axes and to said spools and adapted to be connected the bar at either two points between the spools, for the purpose described.

4:. In a ribbon feeding mechanism, the, combination. of two spools, a ribbon consaid spoolsincluding a longitudinally met able-bar, means for reciprocating said auni'form distance at each actuation thereof to rotate said spools, and means for automatically",varying the point of connection of said reciprocating means with the bar when the ribbon is unwound from either 51131 a ribbon feeding mechanism, the combination of two spools, a ribbon 0on nected to said spools, means for rotating said cat-e transversely of the'axes and to actuate said spools by said reciprocation, and means for reciprocating said bar adapted to be connected therewithat either of two points and to impart a uniform movement to the bar at each actuation thereof.

6. In a ribbon feeding mechanism, the combination of two spools, a ribbon connected to said spools, means for rotating said spools including a bar adapted to reactuate said spools by said reciprocation, means for reciprocating said bar adapted to be connected therewith at either of. two points and to impart a uniform movement to the bar at each actuation thereof, and means for automatically shifting the point of connection of said reciprocating means and bar when the ribbon is unwound from either spool.

7. In a ribbon feeding mechanism, the combination of two spools, a ribbon connected to both spools, a ratchet connected with each spool, a feed pawl for each ratchet, a reciprocatory bar adapted to actuate both pawls by its reciprocation, and means for reciprocating said bar adapted to be conand pawl carrier for reciprocating the latter.

at each operation of the lever, said carrier being adapted to be periodically shifted rela tive to its connection with said lever, for the purpose described.

9. In a ribbon feeding mechanism, the combination of two ools, a feed wheel for each spool, a pawl. .i actuating each spool teed wheel, a reciprocating bar actuating both pawls, and means for reciprocatingsaid bar including a link provided with a pin adapted to be engaged in either of two seats formed in the bar, for the purpose described. f

-10. In a ribbon "feeding mechanism, the

combination of twh'spools, a feed wheel for each spool, a. bar adapted to be reciprocated across the space between said spools, and having mounted thereon two 'pawls each adapted to operate one ofthe feed Wheels,

a lever movable through a fixed distance at each actuation, and a link having one end connected with said lever and its otnerend adapted to engage the pawl carrying bar at ARTHUR PEUTECOST. Witnesses W. J. lVARD,

E. A. BArniLrn 

